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Rainbow & gradient filament, bulk and multi-pack, new, ranked by £/kg — on offer now

Every listing we track on Amazon UK that matches all of these filters, ranked by £/kg. Remove a filter with its "All" chip to widen the list.

4 currently discounted.

Product	Material	Weight	Rating	Price	Per kg	Deal
RAMBERY Matte Rainbow PLA 3D Printer Filament Bundle, 10 Colors Total 10kg, 1.	PLA	10 kg	4.9 out of 5 (11 Amazon ratings)	£96.40	£9.64	58% below
RAMBERY 4 Colors Matte Rainbow PLA 3D Printer Filament Bundle Fast Color Chang	PLA	4 kg	4.8 out of 5 (16 Amazon ratings)	£44.59	£11.15	—
Creality Rainbow PLA+ Filament 1.75mm for 3D Printers, 2kg(4.4lb) +/-0.02mm Di	PLA+	2 kg	5.0 out of 5 (3 Amazon ratings)	£28.33	£14.17	19% below
Creality Rainbow PLA+ Filament 1.75mm for 3D Printers, 4kg(8.8lb) +/-0.02mm Di	PLA+	4 kg	—	£61.02	£15.26	—

Rainbow & gradient filament by brand

Bed adhesion: what actually works
Glue sticks, hairspray, rafts, brims and expensive surfaces — an honest ranking of what fixes prints coming loose, starting with the free fix that solves most cases.
Do you need a filament dryer?
Wet filament is real and ruins prints, but a dedicated dryer is not the only answer. How to tell if moisture is your problem, and what to do about it.
Filament storage: dry boxes, vacuum bags and desiccant
Keeping filament dry is cheaper than drying it out. What actually works, what desiccant to use, and why the little sachet in the bag is already spent.
First layer calibration, properly
Nearly every adhesion problem and half of all print failures start in the first layer. How to set Z offset by eye, and what a good first layer actually looks like.

Best-selling Filament by year — which actually sold best, going back several years, ranked by sales position rather than opinion.